C Tuner is a chromatic instrument tuner and tone generator that allows you to quickly and accurately tune your instrument using the built-in mic in your iPhone or using an external mic on your 2nd or 3rd generation iPod Touch, also, If you want to tuning lower pitch or shorter pitch in any environment, you can use our tools for iPhone tuner. you will find our tuner is do for all of the Instrument.

C Tuner can tune acoustic or electric guitar, bass, bowed strings, woodwinds, brass, piano, tympani, tablas and any other instrument.tuner star pro is not only a tuner with chromatic, It have four instrument mode: guitar tuning / ukulele tuning / violin tuning / ukulele tuning, each instrument with several tuning modes, It help you easier to tuning.

FEATURES
- Support all Transposition: Chromatic Ckey/Ebkey/Fkey/Bbkey/ ...
- For dedicated instrument tuning: guitar/bass/Ukulele/violin
- Subwoofer calibration: G0 (24.5HZ, 20HZ following sound undetectable)
- Accuracy: ± 0.1 cent
- Flat Tuning
- Tone Generator

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Thanks very much for the advice by Ekdenton, we fixed the bug.